LCOV - code coverage report
Current view: directory - js/src - jsfuninlines.h (source / functions) Found Hit Coverage
Test: app.info Lines: 84 80 95.2 %
Date: 2012-04-07 Functions: 20 20 100.0 %

       1                 : /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
       2                 :  * vim: set ts=8 sw=4 et tw=99:
       3                 :  *
       4                 :  * ***** BEGIN LICENSE BLOCK *****
       5                 :  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
       6                 :  *
       7                 :  * The contents of this file are subject to the Mozilla Public License Version
       8                 :  * 1.1 (the "License"); you may not use this file except in compliance with
       9                 :  * the License. You may obtain a copy of the License at
      10                 :  * http://www.mozilla.org/MPL/
      11                 :  *
      12                 :  * Software distributed under the License is distributed on an "AS IS" basis,
      13                 :  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
      14                 :  * for the specific language governing rights and limitations under the
      15                 :  * License.
      16                 :  *
      17                 :  * The Original Code is SpiderMonkey.
      18                 :  *
      19                 :  * The Initial Developer of the Original Code is
      20                 :  * the Mozilla Foundation.
      21                 :  * Portions created by the Initial Developer are Copyright (C) 2010
      22                 :  * the Initial Developer. All Rights Reserved.
      23                 :  *
      24                 :  * Contributor(s):
      25                 :  *
      26                 :  * Alternatively, the contents of this file may be used under the terms of
      27                 :  * either the GNU General Public License Version 2 or later (the "GPL"), or
      28                 :  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
      29                 :  * in which case the provisions of the GPL or the LGPL are applicable instead
      30                 :  * of those above. If you wish to allow use of your version of this file only
      31                 :  * under the terms of either the GPL or the LGPL, and not to allow others to
      32                 :  * use your version of this file under the terms of the MPL, indicate your
      33                 :  * decision by deleting the provisions above and replace them with the notice
      34                 :  * and other provisions required by the GPL or the LGPL. If you do not delete
      35                 :  * the provisions above, a recipient may use your version of this file under
      36                 :  * the terms of any one of the MPL, the GPL or the LGPL.
      37                 :  *
      38                 :  * ***** END LICENSE BLOCK ***** */
      39                 : 
      40                 : #ifndef jsfuninlines_h___
      41                 : #define jsfuninlines_h___
      42                 : 
      43                 : #include "jsfun.h"
      44                 : #include "jsscript.h"
      45                 : 
      46                 : #include "vm/GlobalObject.h"
      47                 : 
      48                 : #include "vm/ScopeObject-inl.h"
      49                 : 
      50                 : inline bool
      51          484970 : JSFunction::inStrictMode() const
      52                 : {
      53          484970 :     return script()->strictModeCode;
      54                 : }
      55                 : 
      56                 : inline JSObject *
      57        46738238 : JSFunction::environment() const
      58                 : {
      59        46738238 :     JS_ASSERT(isInterpreted());
      60        46738238 :     return u.i.env_;
      61                 : }
      62                 : 
      63                 : inline void
      64           26282 : JSFunction::setEnvironment(JSObject *obj)
      65                 : {
      66           26282 :     JS_ASSERT(isInterpreted());
      67           26282 :     *(js::HeapPtrObject *)&u.i.env_ = obj;
      68           26282 : }
      69                 : 
      70                 : inline void
      71         1162560 : JSFunction::initEnvironment(JSObject *obj)
      72                 : {
      73         1162560 :     JS_ASSERT(isInterpreted());
      74         1162560 :     ((js::HeapPtrObject *)&u.i.env_)->init(obj);
      75         1162560 : }
      76                 : 
      77                 : inline void
      78          623184 : JSFunction::initializeExtended()
      79                 : {
      80          623184 :     JS_ASSERT(isExtended());
      81                 : 
      82          623184 :     JS_ASSERT(js::ArrayLength(toExtended()->extendedSlots) == 2);
      83          623184 :     toExtended()->extendedSlots[0].init(js::UndefinedValue());
      84          623184 :     toExtended()->extendedSlots[1].init(js::UndefinedValue());
      85          623184 : }
      86                 : 
      87                 : inline void
      88          623184 : JSFunction::setExtendedSlot(size_t which, const js::Value &val)
      89                 : {
      90          623184 :     JS_ASSERT(which < js::ArrayLength(toExtended()->extendedSlots));
      91          623184 :     toExtended()->extendedSlots[which] = val;
      92          623184 : }
      93                 : 
      94                 : inline const js::Value &
      95            5253 : JSFunction::getExtendedSlot(size_t which) const
      96                 : {
      97            5253 :     JS_ASSERT(which < js::ArrayLength(toExtended()->extendedSlots));
      98            5253 :     return toExtended()->extendedSlots[which];
      99                 : }
     100                 : 
     101                 : namespace js {
     102                 : 
     103                 : static JS_ALWAYS_INLINE bool
     104          736700 : IsFunctionObject(const js::Value &v)
     105                 : {
     106          736700 :     return v.isObject() && v.toObject().isFunction();
     107                 : }
     108                 : 
     109                 : static JS_ALWAYS_INLINE bool
     110        39149406 : IsFunctionObject(const js::Value &v, JSFunction **fun)
     111                 : {
     112        39149406 :     if (v.isObject() && v.toObject().isFunction()) {
     113        39107483 :         *fun = v.toObject().toFunction();
     114        39107483 :         return true;
     115                 :     }
     116           41923 :     return false;
     117                 : }
     118                 : 
     119                 : static JS_ALWAYS_INLINE bool
     120         5610111 : IsNativeFunction(const js::Value &v)
     121                 : {
     122                 :     JSFunction *fun;
     123         5610111 :     return IsFunctionObject(v, &fun) && fun->isNative();
     124                 : }
     125                 : 
     126                 : static JS_ALWAYS_INLINE bool
     127                 : IsNativeFunction(const js::Value &v, JSFunction **fun)
     128                 : {
     129                 :     return IsFunctionObject(v, fun) && (*fun)->isNative();
     130                 : }
     131                 : 
     132                 : static JS_ALWAYS_INLINE bool
     133          328683 : IsNativeFunction(const js::Value &v, JSNative native)
     134                 : {
     135                 :     JSFunction *fun;
     136          328683 :     return IsFunctionObject(v, &fun) && fun->maybeNative() == native;
     137                 : }
     138                 : 
     139                 : /*
     140                 :  * When we have an object of a builtin class, we don't quite know what its
     141                 :  * valueOf/toString methods are, since these methods may have been overwritten
     142                 :  * or shadowed. However, we can still do better than the general case by
     143                 :  * hard-coding the necessary properties for us to find the native we expect.
     144                 :  *
     145                 :  * TODO: a per-thread shape-based cache would be faster and simpler.
     146                 :  */
     147                 : static JS_ALWAYS_INLINE bool
     148          184635 : ClassMethodIsNative(JSContext *cx, JSObject *obj, Class *clasp, jsid methodid, JSNative native)
     149                 : {
     150          184635 :     JS_ASSERT(obj->getClass() == clasp);
     151                 : 
     152                 :     Value v;
     153          184635 :     if (!HasDataProperty(cx, obj, methodid, &v)) {
     154          184635 :         JSObject *proto = obj->getProto();
     155          184635 :         if (!proto || proto->getClass() != clasp || !HasDataProperty(cx, proto, methodid, &v))
     156              18 :             return false;
     157                 :     }
     158                 : 
     159          184617 :     return js::IsNativeFunction(v, native);
     160                 : }
     161                 : 
     162                 : extern JS_ALWAYS_INLINE bool
     163                 : SameTraceType(const Value &lhs, const Value &rhs)
     164                 : {
     165                 :     return SameType(lhs, rhs) &&
     166                 :            (lhs.isPrimitive() ||
     167                 :             lhs.toObject().isFunction() == rhs.toObject().isFunction());
     168                 : }
     169                 : 
     170                 : /* Valueified JS_IsConstructing. */
     171                 : static JS_ALWAYS_INLINE bool
     172          378531 : IsConstructing(const Value *vp)
     173                 : {
     174                 : #ifdef DEBUG
     175          378531 :     JSObject *callee = &JS_CALLEE(cx, vp).toObject();
     176          378531 :     if (callee->isFunction()) {
     177          378531 :         JSFunction *fun = callee->toFunction();
     178          378531 :         JS_ASSERT((fun->flags & JSFUN_CONSTRUCTOR) != 0);
     179                 :     } else {
     180               0 :         JS_ASSERT(callee->getClass()->construct != NULL);
     181                 :     }
     182                 : #endif
     183          378531 :     return vp[1].isMagic();
     184                 : }
     185                 : 
     186                 : inline bool
     187          360508 : IsConstructing(CallReceiver call)
     188                 : {
     189          360508 :     return IsConstructing(call.base());
     190                 : }
     191                 : 
     192                 : inline const char *
     193            2276 : GetFunctionNameBytes(JSContext *cx, JSFunction *fun, JSAutoByteString *bytes)
     194                 : {
     195            2276 :     if (fun->atom)
     196            2276 :         return bytes->encode(cx, fun->atom);
     197               0 :     return js_anonymous_str;
     198                 : }
     199                 : 
     200                 : extern JSFunctionSpec function_methods[];
     201                 : 
     202                 : extern JSBool
     203                 : Function(JSContext *cx, unsigned argc, Value *vp);
     204                 : 
     205                 : extern bool
     206                 : IsBuiltinFunctionConstructor(JSFunction *fun);
     207                 : 
     208                 : /*
     209                 :  * Preconditions: funobj->isInterpreted() && !funobj->isFunctionPrototype() &&
     210                 :  * !funobj->isBoundFunction(). This is sufficient to establish that funobj has
     211                 :  * a non-configurable non-method .prototype data property, thought it might not
     212                 :  * have been resolved yet, and its value could be anything.
     213                 :  *
     214                 :  * Return the shape of the .prototype property of funobj, resolving it if
     215                 :  * needed. On error, return NULL.
     216                 :  *
     217                 :  * This is not safe to call on trace because it defines properties, which can
     218                 :  * trigger lookups that could reenter.
     219                 :  */
     220                 : const Shape *
     221                 : LookupInterpretedFunctionPrototype(JSContext *cx, JSObject *funobj);
     222                 : 
     223                 : static inline JSObject *
     224         7999268 : SkipScopeParent(JSObject *parent)
     225                 : {
     226         7999268 :     if (!parent)
     227            2923 :         return NULL;
     228        17388249 :     while (parent->isScope())
     229         1395559 :         parent = &parent->asScope().enclosingScope();
     230         7996345 :     return parent;
     231                 : }
     232                 : 
     233                 : inline JSFunction *
     234          971430 : CloneFunctionObject(JSContext *cx, JSFunction *fun, JSObject *parent,
     235                 :                     gc::AllocKind kind = JSFunction::FinalizeKind)
     236                 : {
     237          971430 :     JS_ASSERT(parent);
     238          971430 :     JSObject *proto = parent->global().getOrCreateFunctionPrototype(cx);
     239          971430 :     if (!proto)
     240               0 :         return NULL;
     241                 : 
     242          971430 :     return js_CloneFunctionObject(cx, fun, parent, proto, kind);
     243                 : }
     244                 : 
     245                 : inline JSFunction *
     246          992506 : CloneFunctionObjectIfNotSingleton(JSContext *cx, JSFunction *fun, JSObject *parent)
     247                 : {
     248                 :     /*
     249                 :      * For attempts to clone functions at a function definition opcode,
     250                 :      * don't perform the clone if the function has singleton type. This
     251                 :      * was called pessimistically, and we need to preserve the type's
     252                 :      * property that if it is singleton there is only a single object
     253                 :      * with its type in existence.
     254                 :      */
     255          992506 :     if (fun->hasSingletonType()) {
     256           23445 :         if (!fun->setParent(cx, SkipScopeParent(parent)))
     257               0 :             return NULL;
     258           23445 :         fun->setEnvironment(parent);
     259           23445 :         return fun;
     260                 :     }
     261                 : 
     262          969061 :     return CloneFunctionObject(cx, fun, parent);
     263                 : }
     264                 : 
     265                 : inline JSFunction *
     266                 : CloneFunctionObject(JSContext *cx, JSFunction *fun)
     267                 : {
     268                 :     /*
     269                 :      * Variant which makes an exact clone of fun, preserving parent and proto.
     270                 :      * Calling the above version CloneFunctionObject(cx, fun, fun->getParent())
     271                 :      * is not equivalent: API clients, including XPConnect, can reparent
     272                 :      * objects so that fun->global() != fun->getProto()->global().
     273                 :      * See ReparentWrapperIfFound.
     274                 :      */
     275                 :     JS_ASSERT(fun->getParent() && fun->getProto());
     276                 : 
     277                 :     if (fun->hasSingletonType())
     278                 :         return fun;
     279                 : 
     280                 :     return js_CloneFunctionObject(cx, fun, fun->environment(), fun->getProto(),
     281                 :                                   JSFunction::ExtendedFinalizeKind);
     282                 : }
     283                 : 
     284                 : } /* namespace js */
     285                 : 
     286                 : inline void
     287          166822 : JSFunction::setScript(JSScript *script_)
     288                 : {
     289          166822 :     JS_ASSERT(isInterpreted());
     290          166822 :     script() = script_;
     291          166822 : }
     292                 : 
     293                 : inline void
     294          995171 : JSFunction::initScript(JSScript *script_)
     295                 : {
     296          995171 :     JS_ASSERT(isInterpreted());
     297          995171 :     script().init(script_);
     298          995171 : }
     299                 : 
     300                 : #endif /* jsfuninlines_h___ */

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